How can I make a node be readonly AFTER SPECIFIED DAY?

Hello,everyone!
I have a forum made by drupal.
My forum often have some prediction games (3,4 games/ week).

Which module can provide following function:
Before the deadline day, web user can post and edit their predictions (node) on forum;
after the deadline day, web user cannot edit their predictions (node) , their predictions (node)
would changed to be readonly mode. [Certainly, administrator can edit them.]

I used module Auto Expire before. However, this module only can make node be unpublished and deleted.
I want to have a module which has similar function as module Auto Expire, but it can make node be readonly
or non-editable by user AFTER DEADLINE.

[Certainly, if I can set number of days after an item was created when it will be deadline day
(as module Auto Expire), it is wonderful!!]

THANKS!